Ctjrt philipp and richard felbelmabttir



pressure which is of Patented Sept. 22, 1925.

UNITED STATES PATENT OFFICE.

cunr rnrmrr AND RICHARD FEIBELKANN, or

or enosssnnam, GERMANY, Assrenons- '10 cmnuscnu rnnnrx nanunnun, ANDuonun'r von murmur,

OF RADEBEUL-DRESDEN, GER HAIRY, A CORPORATION OF GER-Km.

PROCESS FOR BLEACHING VEGETABLE, ANIMAL, AND ARTIFICIAL 2131338..

Ho' Drawing RICHARD FnmnLu'ANN, both citizens of the Republic ofGermany. residing at. Radebeul, Saxony, and ROBERT Hana-2n, a citizen ofthe Republic of Switzerland, residing at Grosscnhain, Saxony, Germany,have invented certain new and useful Improvements in Processes forBleaching Vegetable, Animal, and Artificial Fibers, of which thefollowing is a specification.

This invention relates to bleaching processes and it particularlyrelates to processes in which a number of materials of greatly varyingcharacter, for instance vegetable fibers such as cotton, flax. straw,hemp, ramie, jute, sisal and the like fibers in their raw state or inthe form of intermediate or finished goods made from them, dyed orprinted textile goods are treated with the salts of the aromaticsulfochloramides. preferably in the form of their aqueous solution. Alsoanimal fibers, such as wool in the raw state or in the form ofintermediate or finished goods made from it, furs, feathers, leather,horn, ivory and the like, as well as artificial fibers, like artificialsilk and the many artificial substitutes for ivory,'if reduced to'thinthreads, or thin sheets, may be bleached by means of the salts of thearcmatic sulfochloramides. We have found that the aforesaid salts maybeapplied with excellent results as a bleaching agent, the efliect ofthese agents being mild which allows several very im ortant vadvantages. For instance cotton an linen fibers are not affected by ourprocess. if treatedatahi h temperature;'even the fiber of artificial silknown to be very sensitive to moisture and chemical agents, is notreduced in strength; it may even be applied for bleaching under greatimportance in the bowking and debasting as our invention makes itpossible'to have the bowking and debasting process accompanied by ableaching process. The bleaching fochloramides 18 based on the gradualneration of oxygen according to the fol owing equation: .v

' Ma r I. p nsoad-mo;uso,nn,+moi+o effect of the salts of the sul-.

Application file'd January 8, 1925. Serial No. 422.

for instance such as sodium, and R repre in which represents amono-valent metal,

sents an aromatic nucleus,such as benzene,

toluene and the like.

It is a special merit of our process that metal oxides, which in otherbleaching processes are often dangerous to the fiber on account of thecatalytic action caused by the same, are without any action whatever inour new process.

For the better understanding of our invention we are going to describeby way of example, how We proceed to carry the same into efl'ect.

E trample 1.Bleaching of washing.

100 kilo soiled washing is acted upon for half an hour in a bath,'with3050 g. of the sodium-salt of ptoluenesulfochloramide at a temperatureof ence of soap and sodium-carbonate 1n the bath accelerating thecleaning process. The aforesaid p-toluene-sulfochloramide-sodiumdissolves the dirt, but it acts especially as a bleaching agent in suchmanner that the lawn-bleach may be entirely dispensed with. Old Washingwith a yellow tinge turns white again.

- Our invention shortens the washin process whereby the material of thewas ingis not exposed to the mechanical treatment for such a long timeas heretofore.

After the washin has been boiled, it is rinsed and dried. 1%xe washingthus treated is distinguished b a fresh pleasant scent.

Example 2.-B eachin textile fabrics.

The raw goods, printe white ground, are worked in a. bath ofslightly'acid reaction, containing 1nr 1000 liters of water 1 K0. ofp-toluene-sulfochlo- .ramide-sodium. The printed color gets richer andthe white ground shows up brighter so as to considerably enhance th apearance of the goods. a

t is possible to comb ne cess with $1? ofapplyrng the mor The goods dyedwith indigo are simultaneously with an organic am and a catalyzer, forwhich purpose com pp T rn, oo e tymqkel, van

dent.

und of 'um and with indigo on a' 50 100 0., the presthe bleaching pm Iof other metals were found suitable.- For instance we reduce 100 g. of aneutralthlckening agent such as starch, 50 g. lactic acld and 10 g.copper sulfide (OuS) to a paste and use the same as printing dye. W1ththis paste the dyed goods are printed. After rying the material ispassed through a hot mordanting bat-h contalnin 10%'p-toluenesulfochloramide sodium. 'The mordanting takes place veryquickly.

Emample 4.

The fabric, dyed with Columbia-black, a direct cotton dye, is treatedwith a' rint ng paste containingfor each 100 g. thickening agent 50 gr.tartaricv acid and 10 gr. ironchloride. The mordanting is'carried out asin example 3. c

' Escample 5.Bleaching of artificial silk.

The raw artificial silk, which in the same factory is not alwaysobtained, batch for batch, in the same shade, is given an equalizingbleach by passing the threads at any convenient temperature through abath of approximately 0.1-O.5% p-toluene-sulfochloramide-sodium, theamount of the same beinggoverned by the desired bleaching. The strengthof the thread is not reduced.

Also the bleaching of straw, flax, cellulose, leather and othervegetable and animal materials can be accomplished in a similar manner.In some cases, as'for instance of leather, it is advantageous to addsome acid to the bleaching liquid. 0

Emample 6'.Bleaching of cotton under pressure. (bowking process).

Yegetable fiber-or fabric is 'heated'in a boller with an alkaline liquidof .for in- I stance 2.5 B. containing for each liter of the bath 1 g.p-toluene-sulfochloramide-sodium. This so-called bowking process causesa considerable preliminary bleaching efl'ect withoutthe formation ofoxycellulose and allows a reduction of the time of the bowking process.

Emample 7'.

egumming and bleaching is done simultaneously bysaturatingthe goods in ahot bath containing approximately 0.10.5% ptoluenesulfochloramide-sodiumand allowing them to stand in Wooden tanks, the latter kind of tanksbeing preferable so as to preserve a temperature of about 7080 C. forone hour.

Example 8.Cleaning and bleaching of raw wool.

Raw wool is washed with an aqueous solugrade of 'mal and artificialfibers,

tion of 0.5 percent of sodium carbonate and of 0.5 percent ofptoluenesulfochloram1de a temperature of 40-50" C. It is then taken fromthe bath, washed with water and dried. In this manner the wool is wellcleaned from fatty products and at the same time bleached.

What We claim is:

l. The process of treating vegetable, animal and artificial fibers, saidprocess comprising acting on the fibers with the salt of an aromaticsulfohalogenamide.

2. The process of treating vegetable, animal and artificial fibers, saidprocess comprising acting on the fibers with the aqueous solution of asalt of an aromatic sulfohalogenamide.

3. The process of treating vegetable, animal and artificial fibers, saidprocess comprising acting on the fibers at an elevated temperature witha solution of a salt of an aromatic sulfohalogenamide.

The process of treating vegetable, animal and artificial fibers, saidprocess comprising acting on the fibers at an elevated temperature witha solution of a salt of an aromatic sulfohalogenamide under pressure.

5. The process of treating fibers, comprising the step of acting on thefibers with a solution of a salt of an aromatic sulfohalogenamide in thepresence of an acid.

The process of treating vegetable, anisaid process comprising acting onthe fibers with the solution of the sodium salt ofp-toluenesulfochloramide.

7. The process of treating vegetable, animal and artificial fibers, saidprocess comprising acting on the fibers at an elevated temperature withthe solution of the sodium salt of p-toluenesulf0chloramide.

e process of treating vegetable, animal and artificial fibers, saidprocess comprising acting on the fibers at an elevated temperature withthe solution of the sodium salt of, p-toluenesulfochlorainide underpressure.

9. The process of prisin the step of acting on the fibers withsulfochloramide in the In testimony whereof we alfix our signatures.

CURT PHILIPP. f RICHARD FEIBELMANNQ ROBERT HALLER.

treat-ing fibers, comthe so ution of the sodium salt of p-toluenepresence of an acid.

